12724320977 has 4 divisors (see below), whose sum is σ = 13134782976. Its totient is φ = 12313858980.

The previous prime is 12724320971. The next prime is 12724321021. The reversal of 12724320977 is 77902342721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12724320977 - 2⁶ = 12724320913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12724320971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205230953 + ... + 205231014.

It is an arithmetic number, because the mean of its divisors is an integer number (3283695744).

Almost surely, 2^12724320977 is an apocalyptic number.

It is an amenable number.

12724320977 is a deficient number, since it is larger than the sum of its proper divisors (410461999).

12724320977 is an equidigital number, since it uses as much as digits as its factorization.

12724320977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410461998.

The product of its (nonzero) digits is 296352, while the sum is 44.

The spelling of 12724320977 in words is "twelve billion, seven hundred twenty-four million, three hundred twenty thousand, nine hundred seventy-seven".